In
St
alla
tI
on
Using the pump
30
English
Fault
Cause
Remedy
6. The pump runs, but gives
no water.
a) Pump inlet pressure too low.
See 5. a).
b) The suction pipe is partly
clogged by impurities.
See 5. b).
c) The foot or non-return valve is
stuck in its closed position.
Remove and clean, repair or replace the valve.
d) Leakage in suction pipe.
See 5. c).
e) Air in suction pipe or pump.
See 5. d).
7. The pump runs backwards
when switched off.
a) Leakage in suction pipe.
See 5. c).
b) Foot or non-return valve
defective.
See 6. c).
c) The foot valve is stuck in
completely or partly open
position.
See 6. c).
8. The pump runs with
reduced performance.
a) Wrong direction of rotation.
Switch off the power supply with the external
circuit breaker, and interchange two phases
in the pump terminal box. See Checking the
direction of rotation on page 27.
W2
U2
V2
U1
V1
W1
HIGH VOLTAGE
DIRECTION OF ROTATION
b) See 5. a), b), c), d).
DB68-05916A-09_IM_DVM Chiller Outdoor_EU_EN_.indd 30
2022-05-02 오전 9:00:02
